JP2007104534A - VoIP GATEWAY - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable setting change of a VoIP gateway at a time of network change when configuring a cheap server-less IP telephone network using a simple gate keeper function of the VoIP gateway without introducing a gate keeper and a SIP server. <P>SOLUTION: Each VoIP gateway on the IP telephone network is designed to automatically form a table indicating a relation between a destination telephone number and a destination IP address in a self device, by periodically performing broadcast transmission and reception of an IP address of the self device and a telephone number of a telephone serving under the self device. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a Voice over IP (hereinafter referred to as VoIP) gateway that accommodates a telephone and a private branch exchange (hereinafter referred to as PBX) and is connected to an Internet Protocol (hereinafter referred to as IP) network.

When constructing a large-scale IP telephone network, when it is desired to use an existing PBX (private branch exchange) or Integrated Services Digital Network (hereinafter referred to as ISDN) I line as it is, a VoIP gateway is generally introduced.
Since VoIP gateways usually do not have a table of telephone numbers and IP addresses, a gatekeeper or Session Initiation Protocol (hereinafter referred to as SIP) server for managing telephone numbers and IP addresses collectively is installed in the IP telephone network. The SIP server responds to the telephone number inquiry from the VoIP gateway with the destination IP address, thereby establishing a call path.

  This makes it possible to centrally manage a table showing the relationship between telephone numbers and IP addresses in the IP telephone network.

  On the other hand, when constructing a small and medium-sized IP telephone network using an existing PBX or ISDN line as it is and using a VoIP gateway, an expensive gatekeeper or SIP server is not introduced, and a table of telephone numbers and destination IP addresses is created. An inexpensive serverless IP telephone network can be constructed by introducing a VoIP gateway having a built-in simple gatekeeper function in the VoIP gateway.

However, in the case of a serverless IP telephone network using this simple gatekeeper function, every time a VoIP gateway is added or a telephone number is added or changed, the destination telephone numbers of all VoIP gateways on the IP telephone network It is necessary to change the table indicating the relationship between the IP address and the destination IP address, and there is a problem in terms of management operation.
JP 2003-298660 A Internet: URL accessed on October 7, 2005 “Data network that only includes VoIP telephones” (https://www.nittocom.co.jp/know_ad/Reference_doc/ncc980601.html)

  The problem to be solved is a serverless IP telephone network in which a VoIP gateway having a simple gatekeeper function is arranged, even when a VoIP gateway is added or a terminal device such as a telephone to be accommodated is added or changed. The table indicating the relationship between the destination telephone number and the destination IP address in the VoIP gateway is to be updated appropriately.

  The first invention of the present invention is a VoIP gateway that accommodates a telephone or an exchange device and connects to an IP network. When there is a change in the installation of the accommodation device, the address information of the own device and the address information of the accommodation device Is broadcast to an IP network.

  A second invention of the present invention is the first invention, wherein the address information of the broadcast VoIP gateway and the address information of the device accommodated in the VoIP gateway are received from the IP network. Storage means for storing the address information and the address information of the apparatus accommodated in the VoIP gateway in association with each other is provided.

  A VoIP gateway with a simple gatekeeper function periodically broadcasts the IP address of its own device and the telephone number of the telephone connected to its own device over the IP telephone network, and each VoIP gateway that receives it broadcasts itself. The contents of the table indicating the relationship between the destination telephone number and the destination IP address in the apparatus are periodically added and updated.

  When the VoIP gateway of the present invention is accommodated by adding (decreasing) a terminal device such as a telephone set, the update information is simply updated by setting and updating the telephone number of the target terminal device in the VoIP gateway. Since the contents of the table showing the relationship between the destination telephone number and the destination IP address in its own device are automatically updated by all VoIP gateways that automatically broadcast to the IP telephone network and receive it, the IP telephone network There is an advantage that management operation becomes easy.

  In a serverless IP telephone network using the simple gatekeeper function of a VoIP gateway, connection information can be easily changed only by the function of the VoIP gateway when an IP telephone network is added or moved.

  FIG. 1 is an example of a serverless IP telephone network using the VoIP gateway 2 of the present invention. The VoIP gateway 2 is connected via the IP network 1, and a telephone 4 is connected directly or via the PBX 3 under the VoIP gateway 2, and a telephone call can be made between the respective telephones 4.

  FIG. 2 is an example of an address information table inside each VoIP gateway 2 in the IP telephone network of FIG. This stores the telephone numbers of the telephones accommodated in the VoIP gateway on the IP network and the IP address of the VoIP gateway accommodating them.

  More specifically, the VoIP gateway with the IP address “A” has the telephone number “201,” of the telephone accommodated in the VoIP gateway with the IP address “B, C, D” that will be the other party. 202, 301, 302, 401, 402 "and the IP address of the VoIP gateway accommodating them are stored in association with each other.

  Each VoIP gateway 2 periodically distributes the telephone number of the telephone 4 accommodated (subordinate to the own device) and the IP address of the own device by broadcast, and builds a table based on the information. As a result, the address table is constructed and updated, the destination IP address for the destination telephone number is known, and it is possible to transmit and communicate.

FIG. 3 shows a state where one telephone 4 having a telephone number 403 is added under the VoIP gateway 2 of the IP address “D” of the IP telephone network of FIG.
Here, information indicating that a telephone having the telephone number 403 has been added is set in the VoIP gateway 2 having the IP address “D”.

  The VoIP gateway of the IP address “D” whose accommodation information has been changed distributes the telephone number of the added telephone 4 and the IP address of its own device by broadcast. Further, the other VoIP gateways 2 that have received the broadcast packet update the table based on the information (corresponding to the destination telephone number 403 and the IP address “D” that is the destination IP address).

  FIG. 4 shows a state where the information of the telephone 4 added to the VoIP gateway 2 with the IP address “D” in FIG. 3 is added to the internal table of each VoIP gateway 2.

  The VoIP gateway with the IP address “A, B, C” that received the broadcast is the telephone number “403” of the telephone accommodated in the VoIP gateway with the IP address “D” and the destination IP address of the telephone. The IP address of VoIP gateway “D” that accommodates the telephone is added.

  Therefore, a VoIP gateway that accommodates telephones and PBXs and connects to an IP network, and has a built-in simple gatekeeper function having a table showing the relationship between the destination telephone number and the destination IP address inside the VoIP gateway. The IP address of the VoIP gateway is not deployed on the IP telephone network without a gatekeeper or SIP server that stores the relationship between the IP address and the destination IP address and responds to the telephone number inquiry from the VoIP gateway. And the telephone number of the telephone connected to the own device is broadcasted to the IP network, and the VoIP gateway that receives the information automatically sends the information of the destination telephone number and the destination IP address in the own device. Reflected in the relationship table The Rukoto, it is possible to provide a VoIP gateway that is to allow updating of the IP telephone network entire connection information in real time.

It is a serverless IP telephone network diagram using the VoIP gateway in the present invention. It is a figure (1) which shows the internal table of each VoIP gateway in this invention. In the IP telephone network of the present invention, it is a diagram in which one telephone is additionally accommodated in a VoIP gateway. It is a figure (2) which shows the internal table of each VoIP gateway in this invention.

Explanation of symbols

1 IP network 2 VoIP gateway 3 PBX
4 Telephone

Claims (3)

A VoIP gateway that houses telephones and switching equipment and connects to an IP network,
A VoIP gateway characterized in that, when there is a change in the accommodation information of the accommodation device, the address information of the own device and the address information of the accommodation device are broadcasted to the IP network. When the address information of the broadcast VoIP gateway and the address information of the device accommodated in the VoIP gateway are received from the IP network,
2. The VoIP gateway according to claim 1, further comprising storage means for storing the address information of the VoIP gateway and the address information of a device accommodated in the VoIP gateway in association with each other. A VoIP gateway that houses telephones and switching equipment and connects to an IP network,
A VoIP gateway characterized in that the address information of the own device and the address information of the accommodation device are periodically broadcast to the IP network.

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